"Intel's CEO, Paul Otellini, hinted that Microsoft is trying to unify their operating systems into one OS that runs from phone to the desktop, his remark raising questions on Windows and Windows Phone 7's future." Obviously, the Windows Phone 7 userland probably runs just as fine on Windows NT as it does on Windows CE, so I honestly don't get the issue here.

... because the WindowsCE variants (including PocketPC, SmartPhone and Windows Phone 7) are also used in long term supported products. Just one example: the handscanners used by UPS, Federal Express, Deutsche Post and many, many others cannot be replaced short term.